The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 1989
Filed:
May. 29, 1987
Masaki Hirota, Shizuoka, JP;
Yazaki Corporation, , JP;
Abstract
A rotation sensor for vehicle includes a drive shaft connected to a rotation shaft of a vehicle by a transmission member, a ring-shaped magnet member provided onto the drive shaft and a detector for detecting change of magnetic flux caused by rotations of the magnetic member, wherein rotation frequency or rotation speed can be measured by detecting the changes of the magnetic flux. The magnetic member is formed of a composition of heat resisting resin and magnetic materials, and the formed magnetic member is fixed to the drive shaft through a heat resistant elastic member. As a result, even if the rotation sensor is located in high temperature place, e.g. around an engine, there is no possibility that a crack in the magnet member will be caused since expansion or contraction in the magnetic member can be absorbed by the elastic member.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile